Description
O-Y22112 is a basal subclade of haplogroup O (M175), defined by the Y22112 marker identified through population genomic studies. It represents an early-diverging branch within the O haplogroup radiation that does not fall within the major O1 or O2 subclades. Found at low frequencies in Southeast Asia and southern China, O-Y22112 represents a relic lineage of the initial O haplogroup diversification in the Upper Paleolithic.
Interesting Fact
O-Y22112, like other basal O subclades, serves as a genetic waypoint that helps researchers reconstruct the initial dispersal of haplogroup O from its origin in Southeast Asia before the O1 and O2 branches underwent their massive demographic expansions during the Neolithic.
Distribution by Ethnicity
| Ethnic distribution | Region | Frequency | Sample |
|---|---|---|---|
| Southeast Asian populations | Southeast Asia | n=800 | |
| South Chinese | South China | n=500 |
Tags
References
- YFull YTree — Haplogroup O (M175) phylogeny.
- ISOGG Y-DNA Haplogroup O — 2024 phylogenetic tree.